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package cn.taketoday.expression.parser;

import cn.taketoday.context.utils.ObjectUtils;
import cn.taketoday.expression.ExpressionException;
import cn.taketoday.expression.lang.EvaluationContext;

/**
 * @author Jacob Hookom [jacob@hookom.net]
 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
 */
public final class AstEmpty extends SimpleNode {

  public AstEmpty(int id) {
    super(id);
  }

  public Class<?> getType(EvaluationContext ctx) throws ExpressionException {
    return Boolean.class;
  }

  public Object getValue(EvaluationContext ctx) throws ExpressionException {

//        final Object obj = children[0].getValue(ctx);
//        if (obj == null) {
//            return Boolean.TRUE;
//        }
//        else if (obj instanceof String) {
//            return Boolean.valueOf(((String) obj).length() == 0);
//        }
//        else if (obj instanceof Object[]) {
//            return Boolean.valueOf(((Object[]) obj).length == 0);
//        }
//        else if (obj instanceof Collection) {
//            return Boolean.valueOf(((Collection<?>) obj).isEmpty());
//        }
//        else if (obj instanceof Map) {
//            return Boolean.valueOf(((Map<?, ?>) obj).isEmpty());
//        }
//        return Boolean.FALSE;
    return ObjectUtils.isEmpty(children[0].getValue(ctx));
  }
}
